1.

When current passing through a series connection of 100Omega resistance and 2H inductance has frequency 25/pi Hz, the phasedifference between voltage and current is .....

Answer»

`90^@`
`60^@`
`45^@`
`30^@`

Solution :If `delta` is the phase difference betweenvoltage and CURRENT ,
`TAN delta = (omegaL)/R=(2pivL)/R` (where v=frequency)
`=(2pixx25/pixx2)/100`
`=100/100`
`tan delta=1`
`therefore delta=45^@`


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